PCB shielding cover, PCB and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of electronics, and discloses a PCB shielding case, a PCB and electronic equipment. According to the utility model, the PCB shielding case comprises a main shielding frame and a main shielding case; the main shielding frame comprises a frame supporting structure perpendicular to the PCB and a main frame structure parallel to the PCB; the frame supporting structure is arranged between two opposite limiting holes of the PCB; the main frame structure covers the PCB in parallel; the main shielding cover comprises a buckle structure used for being fixed to the PCB and a covering structure parallel to the PCB. The buckle structure is connected with the limiting hole of the PCB in a clamping manner; the PCB shielding cover comprises a main frame structure and a covering structure, the covering structure completely covers the main frame structure and is attached to the main frame structure, the PCB shielding cover can be fixed to a PCB through a buckle structure, and the production cost is saved while the PCB shielding cover is effectively prevented from being warped.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a PCB shield, a PCB board, and an electronic device. Background Technology

[0002] With the widespread use of electronic devices, PCBs (Printed Circuit Boards), as one of the core components of modern electronic devices, are widely used in electronic products, industrial equipment, robotics, and other technical fields. Because electromagnetically sensitive modules or circuits are often used in high-frequency or complex signal circuits, they are easily affected by external electromagnetic interference, thus impacting normal operation. Therefore, PCBs need to be used in conjunction with shielding covers to achieve good shielding effects, reduce electromagnetic interference (EMI), protect sensitive circuits on the PCB from external electromagnetic waves, and prevent electromagnetic waves emitted from the PCB from interfering with other devices.

[0003] However, as the number of large-size modules increases, the size of the shielding cover also increases, leading to a growing problem of shielding cover warping due to secondary module mounting. Related technologies address this issue by increasing the amount of solder at the four corners of the shielding cover or by thickening the shielding cover material. However, increasing the amount of solder at the four corners still carries the risk of warping during reflow, and thickening the shielding cover material increases production costs. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a PCB shielding cover, PCB board and electronic device, so that the PCB shielding cover can be fixed to the PCB board by a snap-fit ​​structure, which can effectively prevent the PCB shielding cover from lifting and save production costs.

[0005] To address the aforementioned technical problems, embodiments of this utility model provide a PCB shielding cover, comprising: a main shielding frame and a main shielding cover; the main shielding frame includes a frame support structure perpendicular to the PCB board and a main frame structure parallel to the PCB board; the frame support structure is disposed between two opposing limiting holes on the PCB board; the main frame structure covers the PCB board in parallel; the main shielding cover includes a snap-fit ​​structure for fixing to the PCB board and a covering structure parallel to the PCB board; the snap-fit ​​structure is fastened to the limiting holes on the PCB board; the covering structure completely covers the main frame structure and is fitted snugly to the covering structure.

[0006] An embodiment of this utility model also provides a PCB board, the PCB board comprising: a PCB board body, at least two limiting holes for cooperating with a PCB shield, and the aforementioned PCB shield.

[0007] An embodiment of this utility model also provides an electronic device, including: the PCB shielding cover described above, and the PCB board described above.

[0008] In this embodiment of the utility model, the PCB shielding cover includes a main shielding frame for support. The main shielding frame includes a support structure and a main frame structure for support. The support structure and the main frame structure of the main shielding frame support the shielding cover, preventing damage to components or circuits on the PCB board and reducing PCB maintenance costs. The main shielding cover includes a snap-fit ​​structure and a covering structure. The snap-fit ​​structure matches the PCB shielding cover with the limiting holes on the PCB board to fix the PCB shielding cover, thereby preventing the PCB shielding cover from lifting, improving the stability of the shielding cover installed on the PCB board, and also saving the reinforcement cost of the PCB shielding cover. Attached Figure Description

[0009] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0010] Figure 1 This is a cross-sectional view of a PCB shielding cover provided in an embodiment of the present invention;

[0011] Figure 2 This is a partial cross-sectional view of a PCB shielding cover provided in an embodiment of the present invention;

[0012] Figure 3 This is a partial cross-sectional view of the snap-fit ​​structure of a PCB shielding cover provided in an embodiment of this utility model;

[0013] Figure 4 This is a top view schematic diagram of a PCB board provided in an embodiment of the present invention;

[0014] Figure 5 This is a complete top view of the PCB shielding cover and PCB board in one embodiment of the present invention;

[0015] Figure 6 This is a cross-sectional view of a PCB shielding cover provided in another embodiment of the present invention;

[0016] Figure 7 This is a partial cross-sectional view of a PCB shielding cover provided in another embodiment of the present invention;

[0017] Figure 8 This is a partial cross-sectional view of the snap-fit ​​structure of a PCB shielding cover provided in another embodiment of this utility model;

[0018] Figure 9 This is a complete bottom view of the PCB shield and PCB board in cooperation with another embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with and referenced by each other without contradiction.

[0020] One embodiment of this utility model relates to a PCB shielding cover 1, which can be applied to PCB boards and various electronic devices using PCBs. The PCB shielding cover 1 includes: a main shielding frame 100 and a main shielding cover 200; the main shielding frame 100 includes a frame support structure 101 perpendicular to the PCB board 300 and a main frame structure 102 parallel to the PCB board 300; the frame support structure 101 is disposed between two opposing limiting holes 301 on the PCB board 300; the main frame structure 102 is parallel to and covers the PCB board 300; the main shielding cover 200 includes a snap-fit ​​structure 201 for fixing to the PCB board 300 and a covering structure parallel to the PCB board 300; the snap-fit ​​structure 201 is snapped into place with the limiting holes 301 on the PCB board 300; the covering structure completely covers the main frame structure 102 and is fitted snugly against the covering structure. In this embodiment of the invention, the PCB shielding cover includes a main shielding frame for support. The main shielding frame includes a support structure and a main frame structure for support. The support structure and main frame structure of the main shielding frame support the shielding cover, preventing damage to components or circuits on the PCB board and reducing PCB maintenance costs. The main shielding cover includes a snap-fit ​​structure and a covering structure. The snap-fit ​​structure engages with the limiting holes on the PCB board to fix the PCB shielding cover, thereby preventing the PCB shielding cover from lifting, improving the stability of the shielding cover installed on the PCB board, and also saving on the reinforcement cost of the PCB shielding cover. The following is a detailed description of the implementation details of the PCB shielding cover in the embodiment of the invention. The following content is only for ease of understanding and is not essential for implementing this solution.

[0021] In the first embodiment of this utility model, as Figures 1 to 3 As shown, the snap-fit ​​structure 201 of the main shield 200 includes an outwardly protruding elastic snap spring 2001; the outer edge 2002 of the protrusion of the elastic snap spring 2001 exceeds the predetermined interference amount of the limiting hole 301 of the PCB board 300; the limiting hole 301 of the PCB board 300 and the outer edge 2002 of the protrusion of the elastic snap spring 2001 interfere and clamp together to fix the main shield 200. The value range of the predetermined interference amount is 0.05mm to 0.20mm.

[0022] Furthermore, the snap-fit ​​structure 201 of the main shielding cover 200 also includes an outwardly extending support foot; the support foot is connected to the elastic spring clip 2001, and the support foot abuts against the unshielded surface of the PCB board 300. Fixing the snap-fit ​​structure 201 with the support foot avoids loosening of the elastic spring clip 2001 due to insufficient friction, further improving the stability of the snap-fit ​​structure 201 and ensuring that the PCB shielding cover 1 will not warp.

[0023] Furthermore, the main shielding cover 200 includes four snap-fit ​​structures 201. The elastic snap rings 2001 interfer with and engage with the limiting holes 301 located at the four corners of the PCB board 300 to fix the PCB shielding cover 1 and prevent it from warping. Correspondingly, the PCB board 300 has four limiting holes 301, respectively located at the four corners of the PCB board 300 and spaced at a predetermined distance from the two opposite edges of the PCB board 300. Figure 4 This is a schematic diagram of a PCB board. Limiting holes (not shown in the diagram) are provided at corners A, B, C, and D of the PCB board. Sides a and b of the PCB board are two opposite sides, and corners A and B have two opposite limiting holes. Corners C and D have two opposite limiting holes. Corners A and D are spaced at a preset distance from side a, and corners B and C are spaced at a preset distance from side b.

[0024] Specifically, the PCB shielding cover 1 includes a main shielding frame 100 and a main shielding cover 200. The main shielding frame 100 and the main shielding cover 200 are fitted together. The frame support structure 101 of the main shielding frame 100 is supported on the PCB board 300. The main frame structure 102 is parallel to the PCB board 300. The frame support structure 101 and the main frame structure 102 are integrally formed, meaning they are made of the same material. The main shielding cover 200 consists of a snap-fit ​​structure 201 and a covering structure. The covering structure can be made of alloy materials such as ZSNH zinc-tin-nickel alloy, stainless steel, or nickel silver to achieve electromagnetic signal shielding. The snap-fit ​​structure 201 can be made of an elastic alloy material or stainless steel (such as SUS304).

[0025] Specifically, the elastic retaining spring 2001 has a material thickness of 0.2 mm, an overall vertical length (excluding the outward protrusion) of 1.8 mm, and a vertical length of only the protrusion of 1.0 mm. Since the elastic retaining spring 2001 needs to be interfering with the limiting hole 301 of the PCB board 300 (i.e., interference interference), before the PCB shield 1 is installed, the protrusion of the elastic retaining spring 2001 exceeds the preset interference amount of the limiting hole 301 of the PCB board 300. Therefore, when the PCB shield 1 is installed, the protrusion of the elastic retaining spring 2001 can be tightened by the limiting hole 301. The preset interference amount ranges from 0.05 mm to 0.20 mm, preferably 0.15 mm. The range of the preset interference amount can be adjusted according to actual production needs, and this application does not impose any limitations on it. Figure 5 This is a complete top view of the PCB shielding cover and PCB board used in conjunction with the first embodiment of this application. This utility model enhances the fit between the shielding cover and the PCB board 300 by using an elastic retaining spring 2001, thereby preventing the shielding cover from lifting due to process and flatness issues during secondary surface mounting of the PCB modules.

[0026] In this embodiment of the utility model, the PCB shielding cover includes a main shielding frame for support. The main shielding frame includes a support structure and a main frame structure for support. The support structure and the main frame structure of the main shielding frame support the shielding cover, preventing damage to components or circuits on the PCB board and reducing PCB maintenance costs. The main shielding cover includes a snap-fit ​​structure and a covering structure. The snap-fit ​​structure matches the PCB shielding cover with the limiting holes on the PCB board to fix the PCB shielding cover, thereby preventing the PCB shielding cover from lifting, improving the stability of the shielding cover installed on the PCB board, and also saving the reinforcement cost of the PCB shielding cover.

[0027] The examples mentioned in the above embodiments can be freely combined, and any combination can be understood as an embodiment. The terms "embodiment" or "example" appearing in various locations in the specification do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments.

[0028] In the second embodiment of this utility model, as Figures 6 to 8As shown, the snap-fit ​​structure 201 of the main shielding cover 200 includes: a support covering structure 2005, a connecting structure 2006, a reinforcing structure 2007, and a bending support structure 2008; the support covering structure 2005 is attached to and covers the outer side of the frame support structure 101; the support covering structure 2005 and the bending support structure 2008 are connected through the connecting structure 2006; the reinforcing structure 2007 is attached to the connecting structure 2006; the bending support structure 2008 extends to below the unshielded surface of the PCB board 300 and abuts against the unshielded surface of the PCB board 300. The bending support structure 2008 includes an extension 21 and a bending portion 22. The extension 21 is connected to the connecting structure 2006 and extends below the unshielded surface of the PCB board 300. The bending portion 22 forms a preset angle with the extension 21, and the bending portion 22 abuts against the unshielded surface of the PCB board 300. The preset angle ranges from 130° to 155°.

[0029] Furthermore, the main shielding cover 200 includes four snap-fit ​​structures 201. The snap-fit ​​structures 201 abut against and lock into the limiting holes 301 located at the four corners of the PCB board 300 to fix the PCB shielding cover 1 and prevent the PCB shielding cover 1 from lifting.

[0030] Specifically, the PCB shielding cover 1 includes a main shielding frame 100 and a main shielding cover 200. The main shielding frame 100 and the main shielding cover 200 are fitted together. The frame support structure 101 of the main shielding frame 100 is supported on the PCB board 300. The main frame structure 102 is parallel to the PCB board 300. The frame support structure 101 and the main frame structure 102 are integrally formed, meaning they are made of the same material. The main shielding cover 200 consists of a snap-fit ​​structure 201 and a covering structure. The covering structure can be made of alloy materials such as ZSNH zinc-tin-nickel alloy, stainless steel, or nickel silver to achieve electromagnetic signal shielding. The snap-fit ​​structure 201 can be made of an elastic alloy material or stainless steel (such as SUS304).

[0031] Specifically, the overall length of the support covering structure 2005, connecting structure 2006, reinforcing structure 2007, and bending support structure 2008 of the snap-fit ​​structure 201 is 0.8mm, and the material thickness is 0.25mm. For example... Figure 7As shown, from the shielding surface of the PCB board 300 (i.e., the front side of the PCB board 300, the side with components, circuits, and modules) to the unshielded surface of the PCB board 300 (i.e., the back side of the PCB board 300, the side without components, circuits, and modules), the snap-fit ​​structure 201 consists of, in sequence, a support covering structure 2005, a connecting structure 2006, a reinforcing structure 2007, and a bending support structure 2008. The support covering structure 2005 covers the frame support structure 101 of the main shielding frame 100. The connecting structure 2006 connects the support covering structure 2005 and the bending support structure 2008. The reinforcing structure 2007 strengthens the connecting structure 2006. The bending support structure 2008 abuts against and locks against the unshielded surface of the PCB board 300 at the limiting hole 301, thereby preventing the PCB shielding cover 1 from warping.

[0032] Specifically, such as Figure 8 As shown, the bending support structure 2008 includes an extension 21 and a bending portion 22. One end of the extension 21 extends downwards from the unshielded surface of the PCB board 300, and the other end of the extension 21 is connected to the connecting structure 2006. The end of the extension 21 connected to the connecting structure 2006 is one end of the bending portion 22, and the other end of the bending portion 22 abuts against the unshielded surface of the PCB board 300. Figure 7 As shown, the extensions 21 of the supporting covering structure 2005, connecting structure 2006, reinforcing structure 2007, and bending support structure 2008 are aligned in a straight line. The angle between the bending portion 22 and the extension 21 ranges from 130° to 155°, that is, the angle between the bending portion 22 and the direction of the connecting structure 2006 is from 25° to 50°. Preferably, the angle between the bending portion 22 and the extension 21 is 150°, that is, the angle between the bending portion 22 and the direction of the connecting structure 2006 is 30°. By utilizing the contact between the bending portion 22 and the unshielded surface of the PCB board 300, the PCB shielding cover 1 is fixedly snapped onto the PCB board 300, thereby preventing the shielding cover from lifting due to process and flatness issues during secondary surface mounting of the module.

[0033] Furthermore, the main shielding cover 200 includes four of the aforementioned snap-fit ​​structures 201. Correspondingly, the PCB board 300 has four limiting holes 301, which are respectively disposed at the four corners of the PCB board 300 and are spaced at a preset distance from the two opposite sides of the PCB board 300. Figure 4 This is a schematic diagram of a PCB board. Limiting holes (not shown in the diagram) are provided at corners A, B, C, and D of the PCB board. Sides a and b of the PCB board are two opposite sides, and corners A and B have two opposite limiting holes. Corners C and D have two opposite limiting holes. Corners A and D are spaced at a preset distance from side a, and corners B and C are spaced at a preset distance from side b. Figure 9This is a complete bottom view of the PCB shielding cover used in conjunction with the PCB board according to the second embodiment of this utility model.

[0034] In this embodiment of the utility model, the PCB shielding cover includes a main shielding frame for support. The main shielding frame includes a support structure and a main frame structure for support. The support structure and the main frame structure of the main shielding frame support the shielding cover, preventing damage to components or circuits on the PCB board and reducing PCB maintenance costs. The main shielding cover includes a snap-fit ​​structure and a covering structure. The snap-fit ​​structure matches the PCB shielding cover with the limiting holes on the PCB board to fix the PCB shielding cover, thereby preventing the PCB shielding cover from lifting, improving the stability of the shielding cover installed on the PCB board, and also saving the reinforcement cost of the PCB shielding cover.

[0035] In summary, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. The examples mentioned in the above embodiments can be freely combined, and any combination can be understood as an embodiment. The terms "embodiment" or "example" appearing in various places in the specification do not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments.

[0036] Another embodiment of this utility model relates to a PCB board, including a PCB board body 300, at least two limiting holes 301 for cooperating with a PCB shield 1, and the aforementioned PCB shield 1.

[0037] Specifically, the PCB board 300 is provided with at least two opposing limiting holes 301, and the at least two limiting holes 301 are located on two opposing edges of the PCB board 300. Preferably, the number of limiting holes 301 is four. Figure 4 As shown, corners A, B, C, and D of the PCB board 300 are respectively provided with limiting holes 301. Sides a and b of the PCB board 300 are two opposite sides, and corners A and B each have two opposite limiting holes 301. Corners C and D each have two opposite limiting holes 301. Corners A and D are spaced from side a by a preset distance, and corners B and C are spaced from side b by a preset distance. Specifically, the limiting holes 301 are strip-shaped holes with a length of 2.8 mm and a width of 0.5 mm.

[0038] Another embodiment of this utility model relates to an electronic device, including: the PCB shield 1 described above, and the PCB board 300 described above.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two). In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A PCB shielding cover, characterized in that, include: Main shielding frame and main shielding cover; The main shielding frame includes a frame support structure perpendicular to the PCB board and a main frame structure parallel to the PCB board; The frame support structure is disposed between two opposite limiting holes on the PCB board; the main frame structure covers the PCB board in parallel. The main shielding cover includes a snap-fit ​​structure for fixing to the PCB board and a covering structure parallel to the PCB board; The snap-fit ​​structure is fastened to the limiting hole of the PCB board; the covering structure completely covers the main frame structure and is fitted to fit the covering structure.

2. The PCB shield of claim 1, wherein, The snap-fit ​​structure of the main shielding cover includes an outwardly protruding elastic snap spring; The outer edge of the elastic retaining ring protrudes beyond the preset interference amount of the limiting hole on the PCB board; The limiting hole of the PCB board interferes with the protruding outer edge of the elastic retaining spring to lock the main shielding cover in place.

3. The PCB shield of claim 2, wherein, The preset interference value ranges from 0.05mm to 0.20mm.

4. The PCB shield of claim 3, wherein, The snap-fit ​​structure of the main shield also includes outwardly extending support legs; The support foot is connected to the elastic retaining spring, and the support foot abuts against the unshielded surface of the PCB board.

5. The PCB shield of claim 1, wherein, The snap-fit ​​structure of the main shielding cover includes: a support covering structure, a connecting structure, a reinforcing structure, and a bending support structure; The supporting covering structure is attached to and covers the outer side of the frame supporting structure; The supporting covering structure and the bent supporting structure are connected by the connecting structure; The reinforcing structure is fitted to the connecting structure; The bent support structure extends below the unshielded surface of the PCB board and abuts against the unshielded surface of the PCB board.

6. The PCB shield of claim 5, wherein, The bent support structure includes an extension and a bent portion; The extension is connected to the connection structure and extends below the unshielded surface of the PCB board; The bent portion and the extended portion form a preset angle, and the bent portion abuts against the unshielded surface of the PCB board.

7. The PCB shield of claim 6, wherein, The preset included angle ranges from 130° to 155°.

8. The PCB shield of any one of claims 1 to 7, wherein, The main shielding cover includes four of the aforementioned snap-fit ​​structures.

9. A PCB board characterized by, The PCB board includes: a PCB board body, at least two limiting holes for cooperating with a PCB shield, and a PCB shield as described in any one of claims 1 to 8.

10. An electronic device, comprising: include: The PCB shielding cover as described in any one of claims 1 to 8, and the PCB board as described in claim 9.

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